#include <iostream>

using namespace std;

int x, y;
int day[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main()
{
	cin >> x >> y;

	int ret = 0;

	//枚举月日的组合
	for(int i = 1; i <= 12; i++)
	{
		for(int j = 1; j <= day[i]; j++)
		{
			//1223
			//3221
			int k = j % 10 * 1000 + j / 10 * 100 + i % 10 * 10 + i / 10;
			int num = k * 10000 + i * 100 + j;
			if(x <= num && num <= y) ret++;
		}
	}

	cout << ret << endl;

	return 0;
}
